Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o valor total dos circuitos datados de 22 de abril?
 ###Tabelas: CREATE TABLE completed_buildings (completed_buildings_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Building VARCHAR, City VARCHAR, Height (m/ft) VARCHAR, Built INT) CREATE TABLE bowl_games (bowl_games_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Bowl VARCHAR, Result VARCHAR, Points For INT, Points Against INT) CREATE TABLE superdraft (superdraft_id AUTO_INCREMENT PRIMARY KEY, Season INT, Player VARCHAR, Position VARCHAR, Nationality VARCHAR, Team VARCHAR, Previous college/Team VARCHAR) CREATE TABLE racial_composition (racial_composition_id AUTO_INCREMENT PRIMARY KEY, Municipality (2010) VARCHAR, White (both Hispanic and Non-Hispanic) INT, Black (Both Hispanic and Non-Hispanic) INT, Amerindian (Both Hispanic and Non-Hispanic) INT, n Asia (Both Hispanic and Non-Hispanic) INT, Multiracial (Both Hispanic and Non-Hispanic) INT, Hispanic (Of any Race) INT) CREATE TABLE non-championship_races_review (non-championship_races_review_id AUTO_INCREMENT PRIMARY KEY, Race Name VARCHAR, Circuit VARCHAR, Date VARCHAR, Winning driver VARCHAR, Constructor VARCHAR, Report VARCHAR)  
SELECT COUNT Circuit FROM non-championship_races_review WHERE Date = 22 April